The accumulator provides protection for air conditioning system components. It has a similar function to the receiver drier, but it works on the gaseous side of the A/C loop. Specifically, it is located on the low-pressure side of the circuit between the evaporator outlet and the compressor suction port.
Roles of the accumulator
The accumulator has three distinct roles:
- Preventing compressor failure due to liquid build up
- Retaining system moisture and contaminants
- Ensuring oil return and that only refrigerant is returning to the compressor.
The accumulator is a filter drier that must be replaced approximately every 3 years, or whenever the circuit is opened.